Filter



Dec. 12, 1950 J. P. KovAcs ETAL FILTER 5 Sheets-Sheet 1 Filed March 13, 1946 INVENTORS.

iiHl IH I IIIHH Decl2, 1950 J. P. KovAcs ETAL FILTER 3 Sheets-Sheet 3 Filed March 15, 1946 v III IIIIII I INVZ/VIWRS. Julius 1. [(017009 HTT'OHNE'YS.

Patented Dec. 12, 1950 amass Julius l. Iowans, N

ill William H. Hilltgren, Roselle Park, N. 1., more to Pllrohtor Products, Inc N Delaware N. 1., a corporation Application March 13, 19!, Serial No. 854,342

18 Chips.

This invention relates to filters and more especially to filters for use in connection with the lubricating system 01 an automotive internal combustion engine.

An object of this invention is an improved filter structure as well as improved means for connectins the filter to the lubrication system of an internal combustion engine.

Other objects, novel features and advantages of this invention will become apparent from the followin s ecification and accompanying drawings. wherein:

Fig. 1 is a front elevation of a filter embodying the invention;

Fig. 2 is an elevation at right angles to Fig. 1;

F s. 3, 4, 5 and 6 are sections on the line 3-8 of Fig. 1 illustrating din'erent embodiments of the invention.

A stamped sheet metal bracket III has a fiat section i I in which are provided two ports I! and i3 and also has a section It in the general form of a half cup. A cylindrical casing is has one end seated in said half cup section It to which the casing is permanently attached as by brazing.

The casing it consists of a cup-shaped drawn metal section It having its upper end slightly enlarged to form an annular shoulder ii and a cap section it, the rim of which is in alinement with the shoulder ii, a gasket I! being interposed between said shoulder and said rim. A pipe 28 is located axially of the section it with its lower end extending through an aperture in the bottom of said section and there being a suitable liquid-tight seal between the pipe and the section it. The upper end 01' the pipe 28 is threaded to received the threaded end of a rod 2| extending through the cap it and having a hexagonal head 22 01' greater cross-section than the cap aperture. A gasket 23 is interposed between the head 22 and the cap I8 while in the modifications of Figs. 3, 4 and 6, the rod ii is provided with a bore 24 communicating with radial passageways 25 leading to the interior oi the casing. The rod 2i serves to retain the cap it in assembled relation to the section l6.

In the embodiment of Fig. 3, a fitting 28 is mounted on the lower end of the pipe 20 exterior of the casing l5 and has an annular shoulder 26a engaged by the end of the pipe. A passageway 21 in the fitting 28 provides communication between the end of the pipe 20 and the port l2 in the bracket In and a passageway 28 provides communication between the interior of the pipe Ill and the port it in the bracket Ill. The pipe 2 II has a radial passageway 29 providing communtcation between the interior and exterior of the pipe within the end 01' which is provided a partition II 01 such design and arrangement that the passageway 28 communicates only with the passageway I1 and the passageway 28 is excluded from communication with the passageway 21. A sheet metal cup ii is arranged within the section it in contact with the bottom thereof and has an aperture through which extends the pipe 20. The rim of the cup II is located on a higher elevation than the highest point 01' the passageway II and the cup is closed by an annular diaphragm 82 fixed to the pipe 20 with its outer periphery restiilg on the cup rim and being free to flex relative A collar 33 is fixed to the pipe II above the cup :1 and supports a filtering unit a through which the pipe extends. The filtering unit 34 consists 01' two spaced axially apertured disks between which is arranged a filtering medium annulus II having its central passageway communicating with the disk apertures. The disk apertures are of proper size to fit the pipe 20 while the central passageway preferably is of somewhat larger cross-section than the disk apertures, thereby forming an annular chamber 31 between the inner surface 01' the annulus 38 and the pipe I. for receiving filtrate passing through the filtering medium annulus. Guide collars 38 are supported by the filtering unit 34 within its central passageway for engagement with the pipe 20 to centralize the unit 34 along the pipe 20. The details of the filtering unit are not illustrated as the particular structure of said unit forms no part or the present invention.

The pipe 10 is provided with three sets of radial passageways 39, 39a and 39b respectively and its bore is slightly enlarged to provide an interior annular shoulder 40 which supports an apertured disk ll. A piston valve 42 is slidably mounted in the pipe is beyond the disk 4| and its upward movement is limited by a bushing ll threaded into the pipe Ill. The piston valve 42 is of such design that when it engages the bushing ll it seals the apertures 39b and a spring 0 is provided for biasing the valve piston into such position. Downward movement of the piston valve 4! against the action of the spring ll unseals the apertures 39b.

The filter is assembled with the lubricating systern of an internal combustion engine by bolting the bracket Hi to the engine block with the ports I! and i3 in alinement with corresponding ports in t e e gi e block and communicating with the 3 engine lubricating system. Oil to be filtered fiows through the passageways 21 and II into the cup 3! trom which it escapes into the interior oi the casing II by lifting the outer edge of the diaphragm 32 sufiiciently tor the purpose as illustrated by the broken line position said diaphragm I! in Fig. 3. Normally, the oil flows inwardly through the filtering medium 36 and the filtrate w from the chamber ll through the passageways I9 and 390 into the pipe I! from which it is discharged through the port II. In the event that the oil cannot pass through the filtering medium at the rate it is supplied to the casing l5, it by-passes the filtering medium through the passageways II and the bore ll oi the rod 2! into the upper end of the pipe 20 and moves the piston 42 against the action 01' the spring it into osition to open the passageways "b whereupon 'the liquid flows through said passageways to the exterior of the pipe and then returns to the interior oi the pipe through the peasageways 8! and "a and thence flows through the remainder of the pipe to the port II. The diaphragm 3! acts as a check valve to prevent drain back when fiow through the filter is discontinued. Also, it prevents disturbance and agitation at any precipitated material lying in the bottom of the casing It, thus permitting location of the inlet at the bottom of said casing.

In the embodiment of Pig. 4, a tube 50 is arranged within the pipe III with one end communicating with the passageway 21 in the fitting It and there being substantial clearance between theexteriorsuriaceoithetubelflandtheinterior surface of the pipe 20. At its upper end, the tube II is provided with a flange ll snugly fitting the interior 0! the pipe 20. The pipe 2| is provided with apertures is providing communication between the exterior of the pipe II and the annular space 53 between the tube It and the pipe ll. The apertures in the disks I! are or greater sire than the pipe ll and the chamber ll of the filtering unit 34 is of the same cross-section as thediskaperturea'TheeoilarIIhasacylindrical central portion Ila snugly fitting the aperture in the bottom disk ll.

A cylindrical housing it rests on the upper disk II o! the filtering unit ll and has a bottom aperture in register with the upper disk 3| aperture andatopaperturethroughwhichpassesthe rodli and theupperendo! the housing llisprovided with a collar ll snugly fitting said rod. Housing 4 is prevented from siippinl! ofi rod II when the latter is unscrewed from pipe III and liitedwithcap llasbystakingilaatthe shoulder defined between the externally threaded portionoirodll anditsupperparts,orinother suitable ways. The curved wall of the housing II has several apertures It normally closed by ball valves 51 biased into sealing relation to the apertures by the springs 58. A helical spring I! is interposed between the cap it and the top of the housing 54 to urge the latter against the upper disk ll of the filter unit 34 and the bottom disk II 01 such unit against the collar II.

In the normal operation of this embodiment, oil to be filtered flows through the inlet port It, passageway 2!, tube Ill, rod bore ll and rod passageway ll into the top of the casing and around the filtering unit 3!. Filtrate collecting in the chamber 31 01 the filtering unit fiows by way of the way 52 and annular space a: to the outlet port ii. In the event that the oil cannot pass through the filtering unit at the rate it is supplied to the casing It, it b the same 4 bywayoitheaperturesllinthehousinglland the annular eway between the pipe II and the periphery oitheapertureintheupperdiskil. the balls 61 heingunseated bytheoil pressure, into the chamber 81 or the filtering unit It and thencetothe outlet ilaspreviously described.

Inthemodificafionoil'ig.5,atubeilisarranged within the pipe ii to term an annular spacefil betweenitsoutersuriace and'theinner suriaceotthepipeandhasendfiangesllaengagingtheendsoi'thepipe. Thepipellisexterioriythreadedatitsupperendandisprovided witbasetoiradialpassageways I! communicatingwiththechambers'lotthefilterunitfland anothersetotradialpassageways i8 locatednear theendoithepipe. Thefiiteringunitflissimilartothefliteringimitotr'iasinthattheaperturesinthediskilareoipropersizesnuglyto fit the pipe 20 while the chamber 11 is of somewhat greater cross-section than the disk apertures. The rod II is interiorly threaded and in addition to the radial passageways 2| is provided with additionalradialpassageways II inregister withthe aysflinthepipezil. Asleeve valveiflisslidablymountedontherodllinsealingnelationtothepamagewaysu. Thecupltis supportedbytherodliandsurroundsthesieeve valve I withclearancetherebetween except that thesleevehasaiianaellsn slv inneriaceoi'thecup. Aspringlllsarranged withinthecuptiandengagesthefiangetlto bias the sleeve valve ll into position toseal the my; a. an inverted cup-shaped memberlshasafiangedrim'llens si stheupper diskliandanaperturellthroughwhichtherod 2| extends with clearance between the aperture rimandtherodsurtace. Aspringllinterposed between the cap I and the flange Ill urges the latter into contact with the top disk II and the 40 bottom disk II into contact with the collar 88.

In the normal operation or this embodiment, oiitobefilteredfiowsthroughtheiniet |I,passageway 2'I,tubedlandrod passageways ll into thetopotthecadngandaroundtbefiitering unit. Filtratecollectinginthechamberlloi'the filtering unit flows by way or the sway II and annular space I to the outlet I. In the event that oil cannot pass through the filtering unitattherateitissuppliedtothecasing ll,it by-passesthefilterunit by way of the passageway termed betweenthe periphery oi the aperture ll andtheoutersuriaeeoitherodll andthepassageways'landlilntothe annularspaceli, fiow through the passageways It being permitted by movement of the sleeve valve 0! against the actionoithesp'i'ingllintopositiontounsealsaid Intheembodimentofl'lg.6,theports lland iiareomittediromthebracket llbutthb bracketisprovidedwith thehalicup-shapedsectionllinwhichthecasing llisseated. Apipe Ilcextendsthrough thebottomoi thecasingsection ll andisinteriorly threaded at its mend. Thepipe llaisprovidedwithacollaruwhieh supportstbefilteringunitflwhichissimiiarto thefilteringunitofFigAinthattheaperturesin thedisksliarelargerthanthepipeilaandthe centralchamberSIisoithesamecross-sectionas thcdiakapertures. Thepipellaispa'ovlded with radial II leading iron: the chamberl'itotheinteriorotthepipe.

Theborellottherodilisi'ormedwithavalve seatllandaballvalvellisprovidediorco-operationwlthsaidseat. Asprlngllinterposed betweenthoballl'landanaperturedplugll threadedintothebaseflotrodli biasesthehall into seating position. A sleeve l0 snugly but slidably fits the rod Ii and has a fiange Ii engaging the top disk 38 of the filtering unit 3!. Sleeve I is prevented from slipping oil rod it when the latter is unscrewed from pipe 28a and liftedwith cap llasbystakingliaattheshoulder defined between the externally threaded portion of rod II and its upper parts, or in other ways. A spring '2 interposed between the cover ll and the flange ll serves to urge the latter against the top disk ll and the bottom disk It of the filtering unit into engagement with the collar ll. The casing section It is provided with an inet conmotor 88 through which oil to be filtered is supplied to the interior of the casing. At the bottom end of the pipe Ila there is provided an outlet connector ll communicating with the interior of the pipe and serving to conduct filtrate away from the filter. Normally, the oil to be filtered fiows through the filtering annulus 38 into the chamber 8! and thence through the 1 ll into the pipe 200. In the event that oil cannot pass through the filtering annular 38 at the rate it is supplied to the casing it, it by-p the filtering unit by way of the rod passageways 25 and rod bore 24 to the upper end of the pipe 10a, the ball valve 16 being un'seated by the oil pressure.

We claim:

1. A filter comprising a stamped sheet metal bracket consisting 01' a fiat first section having ports therethrough and a second section in the general form of half a cup, a cylindrical casing having one end seated in said second section, a pipe proiecting through the bottom of said casing, a fitting receiving the end of said pipe and having passageways communicating with said ports, means in said pipe preventing intercommunication between said ports, a filtering unit in said casing, and means including said pipe for directing fiuid fiow from one port to the other through said filtering unit.

2. A filter comprising a stamped sheet metal bracket consisting of a fiat first, section having an inlet port and an outlet port extendin therethrough and a second section in the general form of half a cup, a cylindrical casing having one end seated in said second section, a filtering unit in said casing having a central chamber, a pipe arranged in said chamber and having one end proiecting through the bottom of said casing, a fitting receiving the said end of said pipe and having passageways communicating with said ports and the interior or said pipe, and means in said pipe preventing intercommunlcatlon between said ports, said pipe having an aperture providing communication between said chamber and the outlet port, and means providing communication between the interior oi said casing and the inlet P rt.

3. A filter comprising a stamped sheet metal bracket consisting of a fiat first section hav an inlet port and an outlet port extending therethrough and a second section in the general form of half a cup, a cylindrical casing having one end seated in said second section, a filtering unit in said casing having a central chamber, a pipe extending through the bottom of said casing and into said chamber and having one end extending outwardly oi said casing, said pipe having a. first radial passageway providing communication between the inlet port and the interior of said casing, a fitting receiving said end of said pipe and having passageways communicating with said ports and theinterior of said pipe, and means in said pipe preventing intercommunication between said first radial passageway and the outlet port. and said pipe having a second radial passageway providing communication between said outlet port and said central chamber.

4. A filter according to claim 3 characterised by a cup resting on the casing end and surrounding said pipe with its rim located above said first radial passageway, and a flexible annular diaphragm surrounding and fixed to said pipe with its outer edge engaging said rim.

5. A filter according to claim 3 characterized by a third radial passageway in said pipe providing communication between the interior of the pipe and an upper portion 0! said casing. a piston valve siidable in said pipe and adapted in one position to close said third radial passageway, and resilient means biasing said piston valve into said position.

8. A filter comprising a stamped sheet metal bracket consisting oi' a fiat first section having an inlet part and an outlet part extending therethrough and a second section in the general i'orm oi half a cup, a cylindrical casing having one end seated in said second section, a filtering unit in said casing having a central chamber, a pipe extending through the bottom oi said casing and into said chamber, a tube within said pipe forming an annular space therein, said pipe and said tube each having an end lying outwardly of said bottom of said casing, a fitting receiving the said outwardly extending ends of said tube and pipe and having one passageway providing communication between said annular space and said outlet port and a second passageway providing communication between said tube and the inlet port. a flange on said tube aging the inner surface of said pipe, said pipe h ving a passageway in its wail providing communication between said chamber and said annuiar space, and a plug attached to said pipe. said plug having a passageway providing communication between said tube and the interior of said casing.

7. A filter according to claim 6 characterized by a housing surrounding said plug and having openings providing communication between the interior oi said casing and said chamber, and relief valves in said housing coacting with said openings controlling fiow therethrough.

8. A filter comprising a stamped sheet metal bracket consisting of a fiat first section having an inlet port and an outlet port therethrough and a second section in the general form of half a cup, a cylindrical casing having one end seated in said second section, a filtering unit in said casing having a central chamber, a pipe extending through the bottom oi said casing and into said chamber, a tube within said pipe forming an annular space therein, said tube and said pipe each having an and lying outwardly of the bottom of said casing a fitting receiving the outwardly-lying ends of said tube and pipe and having one passageway providing communication between said annular space and said outlet port and a second passageway providing communication between said tube and said inlet port, a flange on said tube engaging the innor end of said pipe, said pipe having a passageway in its wall providing communication between said chamber and said annular space, and a rod attached to said pipe at its inner end and having a passageway providing communication between said tube and the interior of said casing.

in said pipe and adapted in one position to close said third radial passageway, and resilient means biasing said piston valve into said position.

15. A filter according to claim 12 characterized by a tubular rod attached to said pipe, a housing surrounding said rod and having openings providing communication between the interior of said casing and said chamber, and relief valves in said housing coacting with said openings for controlling flow therethrough.

16. A filter according to claim 13 characterized by passageways in said tubular rod providing communication between said annular space and the exterior of said rod, a sleeve valve slidably mounted on said rod for closing said last-named passageways, means biasing said sleeve into closing position, and cylinder fixed to said rod and having a portion spaced therefrom to receive said sleeve valve and biasing means whereby said sleeve valve may be moved by hydraulic pressure applied thereto.

17. In combination, a filter comprising a cylindrical casing, a tube upstanding within the easing and having an inlet conduit connected to its lower end for delivery thereto of pumped oil and an upper outlet port adjacent the upper end of said tube for admitting oil to said casing, a pipe concentrically arranged about said tube and spaced therefrom and having an outlet conduit connected thereto adjacent its lower end, said pipe having an upper port adjacent its upper end for receiving 011 from said casing, a filtering unit supported within said casing and on the pipe for filtering oil in said casing in its passage from the tube and through the filtering unit, closing off means normally preventing direct passage of oil from said upper port of said tube to the said upper port of said pipe, an additional port interconnecting the pipe and the interior of the casing and a relief valve for said last-named port adjacent the top of said tube and filtering unit whereby back flow of oil from said casing upon cessation of oil pumping is prevented by the l- 10 cation of all of said ports at elevated points of said tube and pipe.

18. In combination, a filter comprising a cylindrical casing, a tube upstanding within the casing and having an inlet conduit connected to its lower end for delivery thereto of pumped oil and an upper outlet port adjacent the upper end of said tube for admitting oil to said casing, a pipe concentrically arranged about said tube and spaced therefrom and having an outlet conduit connected thereto adjacent its lower end, said pip having an upper port adjacent its upper end for receiving oil from said casing, a filtering unit supported within said casing and on the pipe for filtering oil in said casing in its passage from the tube and through the filtering unit, and closing oi! means normally preventing direct passage of oil from said upper port of said tube to the said upper port of said pipe whereby back flow of oil from said casing upon cessation of oil pumping is prevented by the location of all of said ports at elevated points of said tube and pipe.

JULIUS P. KOVACS. WILLIAM H. HULTGREN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Numb er Name Date 1,676,268 Lipscomb July 10, 1928 1,703,335 Bower Feb. 26, 1029 1,780,663 Winslow et al Nov. 4, 1930 1,896,395 Dooley Feb. 7, 1933 2,076,934 Burckhalter Apr. 13, 1937 2,076,935 Burckhalter Apr. 13, 1937 2,158,512 Layte et al May "16, 1939 2,201,418 Williams et a1 May 21, 1940 2,203,668 Burckhalter June 11. 1940 2,239,868 Williams Apr. 29, 1941 

